<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
   <script src="./05.js"></script>
    <title>Document</title>
    <style>
        #box{
            width: 300px;
            height: 300px;
            border: 2px solid red;
        }
    </style>
</head>
<body>
    <div id="box"></div>
</body>
</html>